Search the Dictionary

Characterized by polysynthesis; agglutinative. Polysynthetic twinning (Min.), repeated twinning, like that of the triclinic feldspar, producing fine parallel bands in alternately reversed positions.

Polysynthesis.

complished for example by pressure), the process by which this reversal is brought about. Polysynthetic twinning, repeated twinning of crystal lamellæ, as that of the triclinic feldspars. -- Repeated twinning, twinning of more than two crystals, or parts of crystals. -- Twinning axis, Twinning plane. See the Note und…